Loom attachment



De@ 15,1931. w. R. cARTwRlGHT 1,836,309

LOOM ATTACHMENT Patented Dec. 15, 1931 an TEN T y,

' 1,stools/r AerrnoHivrrziwr ApplicationfledOctober 23, 1929. lSerial"No.401`,7i85.

This invention relates generally to looni attachments Vand the improvements' are 'directed to novel and unique means whereby lettering forme'd'in a 'fabric'fdurinigthe' weaving i5 processmay be dispose-d ina horizontal plane and'atrightfangles to the edges of. saidfabric. Primarily," the objectof thepresent inventionaresidesinthel provision vof an eccentric roller or-roll'ers'adapted to be. associated with by stretching lslightly vthe 4center threads to the end: that the-above recited object maybe U accomplished. 'f

Those skilled in the art to which thisl invention app'e'rtains are aware that inthe Aordinaryfprocessof weavingfespecially in narrow fabric looms, the warp threads pass d through a wire reed which keeps the same straight and which regulates the width of the fabric being woven; ,these wire reeds, called front reeds, being fastened on the batten be'- tween the shuttles.- After each movement of the shuttles by which a filling thread is passed between the warp' threads, the batten moves forward and presses the front reeds against the filling threads, and on each of these forward movements of the batten the front reed pushes the warp threads out a little wider than the width of the fabric being Woven.`

In view of the foregoinvr there is a tendency to create a slaclness or congestion ,of the outer threads as the hatten goes back thus causing a slight curve on the fabric when it passes over straight breast-beam rollers,` this curve being particularly noticeable when block type letters are being woven.

In order to straighten out this curvature 'f it is proposed to mount one or more rollers on a rod attached to the breast-beam of a loom, said roller or rollers being then squared in linewith the front reeds for nal h adjustment, collectively, or individually, to 'LV' meet the varying conditions of the Weaving.

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5 Anothery -obj ect is to provide Y ymeans the form Aoflran Aeccentricroller adapted to com@ pensate for congestion Ioff-the outer threads- Asyvill :presently-appear, these varying conditions,- due to difference in sizeof yarn, tension, strengthiof reeds andimany other factors, are compensated for Aby providing rollers havin'fgxa ydiminishing curve," thus l per- 55v mitting ofadjustmenttomeet any condition ofweaving from neutral to the highestpoint of curvature. Y A

-With'these objects in view, together with others which Vwill. vappear' as the" description i 6o proceeds, 1 the invention resides in thet novel i formation, combination, fand .arrangement 'of parts, all as will be `described .more fully herein-after, illustrated inthe drawings, f and particularly pointed out inthe claims. c5

' said drawings:

Figure -l is a partialplan view of ailoom adaptedto produce: narrowv fabric, illustrating a1 portion. of *the Vusual breastebeamu-and the application Vof the vpresent invention 7n thereto; f v

I2 is .al transverse sectional -view,taken onthe lineQ-i-2fof1Fig. 1, the showingbeing somewhat diagrammatical.

is air-elevational,slightly enlarged, *E of-one ofthe improved rollers.

, Fig-l .isV another view "of the .rol-ler .and showingrFig. 3 inplan. Y

"Fig -5 is .atransverseisection ftalren onthe line 15-5 of Fig. 8o

`Fig. Gis a similar-sectional view taken on theline 6 6 of Fig.- 3. Y r

Fig. 7 w,illustrates `:a portion vcfa Vnarrow. fabric :presenting Y lettering .produced by `the Vapplicationrof any invention. S5

lteferringrnow more-in detail to the ,accompanying drawings, wherein ,like characters of reference denote similarparts throughout the Iseveral views, let 10 indicate the breastbeam ofva narrow fabric loom, the latter also including the shuttles "11 on a "batten. As shown in Fig.'2,the numeral 12 indicates the warp threads before the'` intersection of filling threads carried 'by said shuttles, "while 13denotes thev woven fabric, in` `which letters `may, bef-formed by the intersection of the filling or weftfthreads.

Ars fpreviouslyfpointed lout it is proposed toV fintroducefmy -eccentricwrollers zat the rear oflthe breasteibeam to permit .the passager of the fabric thereover, and to this end tivo-part clamping members 14 are coupled to said breast-beam 10, as shown in Fig. 2, said members 14 being formed to provide a journal bearing for the rod 15 positioned cocxtensive with said breast-beam 10, said rod supporting the eccentric rollers 16.

Referring noW to Figs. 3 to 6 of sait draivings, it will be observed that each of the rollers is provided with a central bore 16a for the reception of said rod 15, threaded apertures 17 and 18 heilig' extended into said bore to receive set-screws 19, (see Fig. 2) whereby the rollers may be mounted on said rod 15 in the desired position. Each of the rollers is provided with oppositely disposed headed portions 20 and 21, which are formed chiringthe turning of the medial curvature portion 22'in a lathe or the like.

Said medial portion 22 presents what may be termed a. diminishing curve. indicating the high point and 23a the loiv point, as shoivn in Fig. 3, While 24 and 25 denote the intermediate curves. (see Fig. 4) arranged substantially at right angles to said high and low points and. disposed on opposite sides of said roller. As clearly shown in said Finis. 3 and 4, the curvature extends longitudinally of the roller in a manner that the radius of the curvature increases from the high point 23 to the intermediate points 24 and 25 and as said radius approaches the low point it becomes substantially equal to the radius of the roller or the headed portions 20 and 21.

After the rollers are positioned on said rod 15 and the clamps affixed to the breast-beam, said rollers are First squared in line with the front reeds for final adjustment to meet the varying conditions of Weaving. as set forth hereinbefore. and in view of the curvature. above described, the edect of the congestion in the outer threads is overcome by slightly stretching the center threads bv a graduated tension Which is greatest at the center. In other Words. a greater tension is exerted. on the center threads by the curvature of the rollers which slightly stretches those threads so that when the Woven fabric passes through the take-up rollers and this teu sion is relieved, the threads spring back due to their own elasticity and thus the natural tendency to produce a curvature during the Weaving, is reduced to a minimum.

In View of the provision of the diminishing curve said rollers may be adjusted on said rod 15, by manipulating` said set-screws 19, to meet any condition of Weaving from neuT tral to the highest point of curvature.

Various slight changes might be made in the general form and arrangement of the parts described Without departing from the invention, and hence I do not limit myself to the precise details set forth, but consider myself at liberty to make such changes and alterations as fairly fall Within the spirit and scope of the appended claims.

I claim:

1. In a loom, the combination with a breastbeam., of a roller positioned adjacent thereto, said roller having a diminishing curved portion to stretch the center threads of a fabric passing thereover and being susceptible of adjustment by rotation to present dierent contours to the fabric passing thereover.

2. A roller adapted to be adjustably attached to a loom for the passage of a Woven fabric thereover, said roller having a medial curved portion presenting oppositely disposed high and low points and oppositely disposed intermediate points.

3. A roller adapted to be attached to a loom adjacent the breast-beam thereof and in the path of a moving Woven fabric, said roller presenting a diminishing curved position including high and low points whereby said roller may be susceptible of adjustment to meet varying Weaving conditions and to exert a tension on the center threads of the fabric.

4. In a loom, the combination with a breastbeam, of a roller positioned adjacent thereto, said roller presenting a curved surface adapted to straighten a fabric passing thereover by placing a graduated tension on the inside threads, such tension being' greatest in the center and which on release will permit said center threads to spring back in line With the outer threads, said roller being susceptible of adjustment by rotation to present different contours to the fabric passing thereover.

In testimony whereof I affix my signature.

WILLIAM R. CAR-TIVRIGHT. 

